Keable studied conducting at the Royal College of Music with Norman Del Mar and later with George Hurst.
A supporter of music of Erich Korngold, he gave the British premiere of Die tote Stadt in a concert performance.
His research in LA led to the first live performance of Korngold's film score The Sea Hawk.
With the Kensington Symphony Orchestra, he has led first performances of works by many British composers, including Peter Maxwell Davies, John Woolrich, Robin Holloway, David Matthews and John McCabe.
[4] His 2004 performance of the premiere of Errollyn Wallen's Spirit Symphony won the Ivors Composer Award in the BBC Radio 3 Listeners' category in 2005.